SCM440 4140 Qt Steel Properties SAE4140 Steel Round Bar

Alloy steel 4140,hot rolled heat treated round bar SCM440 4140 quenched and tempered steel properties 4140 steel equivalent gradeAISI 4140 SCM440 42CrMo Cold drawn steel bar steel shaftsReady stock:1000tons AISI4140 cold drawn steel barCD 4140 / 4142 alloy bar\'s chromium content provides good hardness penetr

Featured Products

Alloy steel 4140,hot rolled heat treated round bar 
SCM440 4140 quenched and tempered steel properties 4140 steel equivalent grade

AISI 4140 SCM440 42CrMo Cold drawn steel bar steel shafts
Ready stock:1000tons

 
  1. AISI4140 cold drawn steel bar

CD 4140 / 4142 alloy bar's chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength.  This alloy responds well to heat treatment.  In the annealed condition it machines at 110 sfm.  It also has good wear resistance, toughness, and good ductility in the quenched and tempered condition.  This grade can also be supplied as turned ground and polished for tighter dimensional tolerances for bearing fitting applications.
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar



2.AISI 4140 Cold drawn steel bar Typical applications

Typical applications are highly stressed parts or parts subject to severe wear..

3.AISI 4140 cold drawn steel bar main type and avaliable sizes
Round bars5mm-130mm
Suqare bar6*6mm-100*100mm
Flat bars3mm*20mm-50mm*100mm
Hex bars6mm-100mm
Bar FinsihePeeled, Cold Drawn, TurnedTurned & Polished, Centreless Ground

4.AISI 4140 Cold drawn steel bar size tolerance

h9,h10,h11 or other tolerance according to client's requirement
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar

5.AISI 4140 Cold drawn steel bar chemical composition(%)
GradeCSiMnPSCrMo
42CrMo40.38-0.450.17-0.370.40-0.70≤0.035≤0.0350.90-1.200.15-0.25
1.72250.38-0.45≤0.400.60-0.90≤0.025≤0.0350.90-1.200.15-0.30
41400.38-0.430.15-0.350.75-1.00≤0.035≤0.0400.80-1.100.15-0.25


6.AISI 4140 Alternative grade in different standard
GB42CrMo
ASTM4140
JISSCM440
DIN1.7225

7.AISI 4140 Typical Mechanical Properties

Grade:ASTM A29  4140  42CrMo  SCM440
Hardness:217HB  
Tensile  strength:1080(110)MPA  
Yield  strength: 930(95)MPA
elogation:12%  Reduction  of  area:45%   AKV(impact  value):63J

TYPICAL MECHANICAL PROPERTIES FOR ANNEALED

Tensile Strength 723 - 830Mpa
Yield Strength585 - 450Mpa
Elongation in 2"15% - 25%
Reduction of area45% - 55%
Brinelle Hardness215-235HB

TYPICAL MECHANICAL PROPERTIES FOR QT

Tensile Strength 890
Yield Strength755
Elongation in 2"16%
Reduction of area50%
Brinelle Hardness269-321

8.Straightness: 1mm/m(max)
9. Steel bar Packing:
*Bars from different heats will not be mixed and dispatched.
*Bars will be bundles and securely metal strapped in 3 min places of the bar length and tagged properly.
*For further processing products such as cold drawn/peeled or heat treated goods, plastics bag wrapped or pallet loading is available according to customer's demands.
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar


10.Delivery time of steel bar:
7-10days of stock,30 days after order confirmed of new material
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar
Scm440 4140 Qt Steel Properties SAE4140 Steel Round Bar

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